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Interpreter_Paired: Unset FPSCR.FI and FR in ps_res and ps_frsqrte in exceptional cases

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If invalid operation exceptions or zero divide exceptions occur in
either of these instructions, FI and FR are supposed to be unset.
This commit is contained in:
Lioncash 2018-06-02 20:42:45 -04:00
commit d05c2ef90d
1 changed files with 6 additions and 0 deletions
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6
Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp
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@ -121,6 +121,8 @@ void Interpreter::ps_res(UGeckoInstruction inst)
if (a == 0.0 || b == 0.0) if (a == 0.0 || b == 0.0)
{ {
SetFPException(FPSCR_ZX); SetFPException(FPSCR_ZX);
FPSCR.FI = 0;
FPSCR.FR = 0;
} }
rPS0(inst.FD) = Common::ApproximateReciprocal(a); rPS0(inst.FD) = Common::ApproximateReciprocal(a);
@ -136,11 +138,15 @@ void Interpreter::ps_rsqrte(UGeckoInstruction inst)
if (rPS0(inst.FB) == 0.0 || rPS1(inst.FB) == 0.0) if (rPS0(inst.FB) == 0.0 || rPS1(inst.FB) == 0.0)
{ {
SetFPException(FPSCR_ZX); SetFPException(FPSCR_ZX);
FPSCR.FI = 0;
FPSCR.FR = 0;
} }
if (rPS0(inst.FB) < 0.0 || rPS1(inst.FB) < 0.0) if (rPS0(inst.FB) < 0.0 || rPS1(inst.FB) < 0.0)
{ {
SetFPException(FPSCR_VXSQRT); SetFPException(FPSCR_VXSQRT);
FPSCR.FI = 0;
FPSCR.FR = 0;
} }
rPS0(inst.FD) = ForceSingle(Common::ApproximateReciprocalSquareRoot(rPS0(inst.FB))); rPS0(inst.FD) = ForceSingle(Common::ApproximateReciprocalSquareRoot(rPS0(inst.FB)));